Convert Percent per kelvin to ppm per degree Fahrenheit
Convert Percent per kelvin (%/K) to ppm per degree Fahrenheit (ppm/°F) instantly and accurately.
Conversion Formula
ppm/°F = %/K × 5555.555556
About Percent per kelvin
The %/K equals exactly 10⁻² /K = 10 000 ppm/K and is used for high-CTE materials such as polymers, foams, and rubber. PTFE: ≈0.0135 %/K; HDPE: ≈0.015 %/K; natural rubber: ≈0.06 %/K; silicone rubber: ≈0.10 %/K. 1 %/K = 10⁻² /K = 10 mm/(m·K) = 10 000 ppm/K.
About ppm per degree Fahrenheit
The ppm/°F (= μin/(in·°F) exactly) equals 9/5 × 10⁻⁶ /K ≈1.8 × 10⁻⁶ /K and is the dominant CTE unit in US ASTM standards, ASME piping codes, and mechanical engineering handbooks. Steel ≈6.7 ppm/°F; aluminium ≈12.8 ppm/°F; copper ≈9.4 ppm/°F. 1 ppm/°F = 9/5 × 10⁻⁶ /K.
Quick Reference Table
| Percent per kelvin (%/K) | ppm per degree Fahrenheit (ppm/°F) |
|---|---|
| 1 %/K | 5555.56 ppm/°F |
| 2 %/K | 11111.1 ppm/°F |
| 5 %/K | 27777.8 ppm/°F |
| 10 %/K | 55555.6 ppm/°F |
| 25 %/K | 138889 ppm/°F |
| 50 %/K | 277778 ppm/°F |
| 100 %/K | 555556 ppm/°F |